diff --git a/neetbox/daemon/client/_action_agent.py b/neetbox/daemon/client/_action_agent.py
index 18ed5e86..25c21eb8 100644
--- a/neetbox/daemon/client/_action_agent.py
+++ b/neetbox/daemon/client/_action_agent.py
@@ -62,6 +62,7 @@ def run_and_callback(target_action, params, callback):
             Thread(
                 target=run_and_callback,
                 kwargs={"target_action": target_action, "params": params, "callback": callback},
+                daemon=True,
             ).start()
             return None
         else:  # blocking run
diff --git a/neetbox/daemon/client/_connection.py b/neetbox/daemon/client/_connection.py
index 942cd3a4..c175ab43 100644
--- a/neetbox/daemon/client/_connection.py
+++ b/neetbox/daemon/client/_connection.py
@@ -49,10 +49,6 @@ class ClientConn(metaclass=Singleton):
     __ws_subscription = Registry("__client_ws_subscription")  # { event-type-name : list(Callable)}
 
     def __init__(self) -> None:
-        cfg = get_module_level_config()
-        _root_config = get_module_level_config("@")
-        ClientConn._display_name = cfg["displayName"] or _root_config["name"]
-
         def __load_http_client():
             __local_http_client = httpx.Client(
                 proxies={
@@ -67,6 +63,8 @@ def __load_http_client():
 
     def _init_ws():
         cfg = get_module_level_config()
+        _root_config = get_module_level_config("@")
+        ClientConn._display_name = cfg["displayName"] or _root_config["name"]
 
         # ws server url
         ClientConn.ws_server_addr = f"ws://{cfg['host']}:{cfg['port'] + 1}{CLIENT_API_ROOT}"
@@ -83,7 +81,7 @@ def _init_ws():
             on_close=ClientConn.__on_ws_close,
         )
 
-        Thread(target=ws.run_forever, kwargs={"reconnect": True}).start()
+        Thread(target=ws.run_forever, kwargs={"reconnect": True}, daemon=True).start()
 
         # assign self to websocket log writer
         from neetbox.logging._writer import _assign_connection_to_WebSocketLogWriter
diff --git a/neetbox/daemon/client/_daemon_client.py b/neetbox/daemon/client/_daemon_client.py
index 4841c7b1..6ffa701e 100644
--- a/neetbox/daemon/client/_daemon_client.py
+++ b/neetbox/daemon/client/_daemon_client.py
@@ -91,9 +91,7 @@ def _check_daemon_alive(_api_addr):
         global __upload_thread
         if __upload_thread is None or not __upload_thread.is_alive():
             __upload_thread = Thread(
-                target=_upload_thread,
-                daemon=True,
-                args=[cfg, _base_addr, _display_name],
+                target=_upload_thread, args=[cfg, _base_addr, _display_name], daemon=True
             )
             __upload_thread.start()
 
diff --git a/neetbox/pipeline/_signal_and_slot.py b/neetbox/pipeline/_signal_and_slot.py
index 5acb99dd..9f76f6ab 100644
--- a/neetbox/pipeline/_signal_and_slot.py
+++ b/neetbox/pipeline/_signal_and_slot.py
@@ -75,7 +75,9 @@ def _so_update_and_ping_listen(_name, _value, _watch_config):
                 f"Watched value {_name} takes longer time({delta_t:.8f}s) to update than it was expected({expected_time_limit}s)."
             )
 
-    Thread(target=_so_update_and_ping_listen, args=(name, _the_value, _watch_config)).start()
+    Thread(
+        target=_so_update_and_ping_listen, args=(name, _the_value, _watch_config), daemon=True
+    ).start()
     return _the_value
 
 
diff --git a/pyproject.toml b/pyproject.toml
index 2a29c61c..46c49a15 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -45,8 +45,8 @@ pytest = "^7.4.3"
 pyfiglet = "^1.0.2"
 httpx = "^0.24.0"
 flask = "^2.2.3"
-flask-socketio = "^5.3.6"
 websocket-client = "^1.6.4"
+websocket-server = "^0.6.4"
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^7.0.0"